16 Secondary Selective System Normally operated as two electrically independent substations with tie breaker open Failure of either primary circuit affects only one bus Service restored by opening dead bus main and closing tie Operation can be made automatic Transformers not paralleled so fault currents similar to radial

17 Two-Source Primary Secondary Selective

18 Sparing Transformer System Alternative to Double-Ended Substations Single Common Backup Transformer Service restored by opening dead bus main and closing tie Operation can be made automatic Transformers not paralleled so fault currents similar to radial Location of substations limited (must be clustered)

52 Maintenance - PCBs Designed to be serviced Replacement parts are available (contacts, pole assemblies, arc chutes) Inspection and maintenance program is recommended Keep it dry, keep it clean, keep it tight

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PART 1 1.1 1.2 1.3 1.4 1.5 GENERAL SECTION INCLUDES A. Main Switchboard Furnish and install the Service Entrance switchboard(s) as herein specified and shown on the associated electrical drawings. B. Distribution

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Scopes of Work for Electrical Acceptance Testing Schneider Electric Services: life-cycle solutions for electrical distribution equipment Make the most of your energy SM Scopes of Work for Electrical Acceptance

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General Application Siemens 38kV type GM38 metal-clad switchgear is used to control and protect transformers, capacitor banks, distribution lines, and various types of circuits in utility systems, large

1 General 1.1 Switchboards shall be U.L. listed and labeled. 1.2 Each switchboard shall have its own main disconnecting means unless it is located in the same room as its source of origin. In most cases

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